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Developing device and image forming apparatus using the developing device

A developing device and a developer technology are applied in the equipment of the electric recording process applying the charge pattern, the electric recording process applying the electric charge pattern, the electric recording technique, etc., to achieve the effect of improving the mixing efficiency and preventing the reduction of the image density

Inactive Publication Date: 2011-07-27
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a developing device for circulating, conveying, and agitating a developer through a conveying member capable of improving agitation of supplied toner and The efficiency of the developer without applying excessive stress to the developer, thereby preventing image density reduction caused by insufficient developer fluidity and image fogging caused by insufficient toner charging

Method used

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  • Developing device and image forming apparatus using the developing device
  • Developing device and image forming apparatus using the developing device
  • Developing device and image forming apparatus using the developing device

Examples

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Embodiment Construction

[0021] The developing device of the present invention includes: a developer container containing a developer including toner and a magnetic carrier; a developer conveying passage provided in the developer container; a developer conveying member provided in the developer conveying passage, for agitating the developer while conveying the developer; and a developing roller for carrying the agitated developer and for supplying toner contained in the developer to the photoconductor drum. Further, in the developing device of the present invention, the developer conveying member includes a rotating shaft and a wavy helical blade provided along an outer periphery of the rotating shaft. The corrugated helical blade is a helical blade having a wavy surface including a developer pressing surface with a regularly or irregularly changing angle of attack. In addition, the above-mentioned angle of attack is the angle between the axis of the rotation shaft and the tangent line (developer pres...

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Abstract

A developing device includes a developer container for containing a developer including a toner and a magnetic carrier; a developer conveying path provided in the developer container; a developer conveying member, provided in the developer conveying path, for agitating and conveying the developer; and a developing roller for holding the agitated developer so that the toner included in the developer is supplied to a photoconductor drum, wherein the developer conveying member includes a rotating shaft, and an undulated helical blade provided along an outer circumference of the rotating shaft.

Description

technical field [0001] The present invention relates to a developing device and an image forming apparatus using the developing device, and more particularly to an image forming apparatus for use in electrophotographic methods such as electrophotographic copiers, laser printers, and facsimiles by using toner A developing device that forms an image and uses a two-component developer including toner and a magnetic carrier, and an image forming apparatus using the developing device. Background technique [0002] In general, image forming apparatuses such as copiers, printers, and facsimiles using an electrophotographic method are known. In an image forming apparatus using an electrophotographic method, an electrostatic latent image is formed on the surface of a photoconductor drum (toner image carrier), toner is supplied to the photoconductor drum by a developing device to develop the electrostatic latent image, and the electrostatic latent image is formed by development. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/00
CPCG03G2215/0822G03G15/0808
Inventor 见原幸一永井隆文
Owner SHARP KK